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Hilbert C*—模中g(shù)—Riesz基的新刻畫

2018-05-08 11:11相中啟
關(guān)鍵詞:算子對(duì)偶小波

摘 要 利用算子理論方法證明了Hilbert C*-模上的可伴算子序列是g-Riesz基且有唯一對(duì)偶g-框架當(dāng)且僅當(dāng)相應(yīng)的合成算子是一線性同胚,這修正了已有的一個(gè)結(jié)論.進(jìn)一步,作為該結(jié)果的直接應(yīng)用,給出了Hilbert C*-模中的g-Riesz基具有唯一對(duì)偶g-框架的保界等價(jià)刻畫.

關(guān)鍵詞 Hilbert C*-模;g-框架;g-Riesz基;對(duì)偶g-框架

中圖分類號(hào) O177.1文獻(xiàn)標(biāo)識(shí)碼 A文章編號(hào) 1000-2537(2017)06-0080-07

Abstract The present paper proves, by utilizing the method of operator theory, that a sequence of adjointable operators on a Hilbert C*-module is a g-Riesz basis with unique dual g-frame if and only if the corresponding synthesis operator is a homeomorphism, which provides a correction to one existing conclusion and further, as a direct application of this result, it gives an equivalent characterization for g-Riesz bases with unique dual g-frames in Hilbert C*-modules, which preserves the g-frame bounds.

Key words Hilbert C*-module; g-frame; g-Riesz basis; dual g-frame

參考文獻(xiàn):

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[3] CHRISTENSEN O. An introduction to frames and Riesz bases [M]. Boston: Birkhuser, 2002.

[4] 郭訓(xùn)香. Hilbert空間上的預(yù)框架算子[J].應(yīng)用數(shù)學(xué)學(xué)報(bào), 2012,35(5):795-803.

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[15] 相中啟,簡(jiǎn)輝華. Hilbert C*-模中對(duì)偶g-框架的穩(wěn)定性[J].湖南師范大學(xué)自然科學(xué)學(xué)報(bào), 2015,38(2):68-73.

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